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(No Model.)

G. V. BECKER.

2 Sheets-Sheet 1.

FEED MEGHANISM FOR ROLLER MILLS.

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(No Model.) I G. V. HECKER.

FEED MECHANISM FOR ROLLER MILLS. No. 287,126. Patented Oct. 23, 1883.

' WITNEEEIEEI lN-VENTUR lJ'NrTED STATES GEORGE V. HE OKER,

OF NEW YORK, N. Y.

,FEED MECHANISM FOR ROLLER-MILLS.

SPECIFICATION forming part of Letters Patent No.-287,126, dated October23, 1883,

' Application filed August 2, 1883. (No model.)

To all whom it may concern.-

Be it known that I, GEORGE V. HEOKER, of New York, State of New York,have invented a certain Improvement in Feed Mechanisms for Roller-Mills,of which the following is a specification.

My invention .relates to that class of feeding mechanism forgrinding-rollers by which granular materials which have been depositedin a hopper are discharged therefrom through a narrow slot at the bottomin a thin sheet, which falls into the space between the adj oining sidesof the grinding-rollers.

It has been common to provide means for varying the width of thedischarge-slot in the bottom of the hopper.

My invention consists in the combination of the hopper, provided with anadjustable gate for varying the width of the discharge-opening of thehopper, with a cylinder and means for imparting to the same anendwise-reciprocating motion, and also rotation in such direc tion thatits upper surface moves toward the adjustable gate, which constitutesone longitudinal side of the discharge-opening, while the surface of thecylinder constitutes the other longitudinal side of the dischargeopening. The compound motion thus imparted to the cylinder insures theequal distribution of the granular material and its discharge throughthe space between the gate and the cylinder in a sheet of uniformthickness.

The accompanying drawings representing a double hopper provided with myimproved discharging apparatus are as follows:

Figure 1 is a front elevation, with portions of the front of theapparatus shown as broken away. Fig. 2 is an end elevation, partly insection through the line X X on Fig. l.

The drawings represent the usual double hopper surmounting twoprismoidally-shaped chambers, each provided with the devices foreffecting the even delivery of the material to be ground to the pairs ofgrinding-rollers arranged, respectively, beneath the chambers. Eachchamber A of the double hopper has inwardly-inclined sides, with anopening, a, at the bottom, which is partially closed by the surface ofone of the distributing-cylinders B.

The lower portion of the outer wall of each chamber is provided with theusual adjustable gate, 0, affixed to the rock-shaft 0, provided with theslotted radius-bar O and bind ing-screw 0 by means of which the loweredge, 0, of the gate is capable of being adjusted and fastened atvariable distances from the sursired. In order to agitate the lowerstratum of the material in the hopper and prevent it from packing, andalso in order to insure its discharge in a sheet of uniform thickness, Iimpart to each distributing-cylinder an endwise'r'eciprocating movement,by which the cylinder is made to act as an evener as Well as anagitator. The cylinder B for each chamber is fixed upon ashaft,B,'supported in bearings B and B", and capable of endwise move menttherein. At one end of each shaft 13 there is affixed a cam-wheel, D,provided upon its periphery with the sinuously-curved rib d. The endwisemovement of each cylinder is efd mounted, respectively, upon verticalpivots d and d", affixed to the horizontal projection A of the frame ofthe machine. It will be seen that each distributing-cylinder in rotatingis made to move longitudinally from right to left and from left toright,.as the sinuosities of the rib (I travel between the station aryrollers cl and d .v It will of course be understood that, if desired,single hoppers may be used instead of a double hopper, in which caseonly one discharge-outlet will be employed, and either of the chambers Amaybe regarded as the hopper.

It will also be seen that the hopper need not be of the proportionaldimensions indicated in the drawings, nor necessarily be in closeproximity to the distributing mechanism, as the equalizing effect wouldalso be produced upon a stream of grain fed to the distributingmechanism from a spout or chute, in which case the adjustable gate andthe adjoining upfected by means of the stationary rollers d and persurface of the cylinder would constitutethe front and rear boundaries ofa shallow hopper, and the space between them the discharge-opening.

I claim as my invention- 1. In combination with a hopper for receiv- 5ing granular materials, a distributing-cylinder extending.longitudinally across the discharge-opening of the hopper, and means forimparting to such cylinder an endwise-recip' rocating movement, and alsoa rotatory move- 10 ment upon its own axis, substantially as and for thepurposes set forth.

2. A hopper for receiving granular mate-

